Re: NoClassDefFoundError: org/apache/log4j/Logger

[Jacob Kjome]

I smell commons-logging somehow finding log4j in a different classloader 
(WEB-INF/lib) and trying to use it in another classloader.  I won't 
speculate as to exactly how it accomplishes this feat, but it is almost 
definitely commons-logging's fault.  Anyway, try adding log4j.jar to 
CATALINA_HOME/common/lib.  You might also want to add a log4j.xml file in 
common/classes which simply supplies a console appender.  Then to make sure 
app logging is separated, either put log4j.jar in each app's WEB-INF/lib 
and/or use a custom repository selector.

Jake

At 09:18 PM 1/4/2004 +0100, you wrote:
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I get the above error message when starting Tomcat 5.0.7 (which comes with
JWSDP 1.3 from Sun) inside Eclipse. I put log4j-1.2.8.jar into the
WEB-INF/lib directory of my web application and added the JAR-file to the
"Java Build Path" property of my Java project. When I compile the project
everything works fine. No error messages. But when I start Tomcat I get the
above error message.
A friend told me that the described procedure worked for him with a
"standalone" Tomcat 4.1.27. Are there any problems with the Tomcat version
that comes with JWSDP 1.3?
Any ideas what might be the problem?

Best regards,
Ralf.
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